Basic Studies on the Quality Evaluation of Agricultural Products

Quantification of Gloss of Eggplants by Spectral Characteristics

Abstract

Color and gloss are important elements in quality evaluation of agricultural products. As compared with data on the color, there is few data on the gloss. The gloss in surface of eggplant was measured by spectral radio-meter system, and the degree of gloss was quantified by integrated relative spectral reflectance in visible range. The changes of gloss with time under some storage conditions were investigated, and it was found that the relative spectral reflectance values for eggplants decreased remarkably after 48 hours of storage regardless of conditions. The decrease of relative spectral reflectance value was observed remarkably in glossy samples.